Portable loud speaker



June 29 1926.

c. G. DURETT I PORTABLE LOUD SPEAKER Filed Sept. 14, 1925 mmmm Patented June 29, 1926.

COB-AL G. DURETT, OF PTTTSFIELID, MASSACHUSETTS.

PORTABLE LOUD srEAKnR.

Application filed September 14, 1925. Serial No. 56,211.

The primary object of the invention is the provision of a loud speaker having a collapsible horn whereby the device can be readily and easily carried in ones pocket or can be stowed in a very small space.

Another object of the invention is the provision of a loud speaker which has a collapsible horn which renders the device very small in its collapsed form and is therefore particularly adapted for use with portable radio receiving sets where the conservation of space is quite important.

Another and further object of the invention is the provision of a. portable loud speaker which is acomplete unit ready for plugging in or connection with a radio receiving set and is so constructed that it can be carried in ones pocket or be stowed in a very small space.

ther objects, novel features of construction and improved results of the invention will appear from the following description and accompanying drawings.

In the drawings:

Figure 1 is a view in side elevation of the invention.

Figure 2 is a vertical sectional view through the .horn and a portion of the receiver.

Figure 3 is a side view showing the device in its collapsed form.

Referring to the drawings, in which like parts are designated by similar reference numerals throughout the description, 5 represents an ordinary receiver which is well known in the art. The receiver is provided with an ear piece 6 and the common lead in wires 7 and 8.

Mounted upon the receiver is a horn A which is held in position by a clamp, the arms 9 and 10 of which engage the receiver 5 as at 11 and 12. The upper ends of the clamp arms 9 and 10 are fastened to the lower horn section or ring 13 which section is in reality a. cup, the bottom of which has a circular opening. The peripheral edge 14 of the bottom opening of the horn sec-' tion 13 is in engagement with the ear piece 6 of the receiver.

In addition to the lower section 13 the horn A consists of the telescoping sections 15 and 16, 17, 18 and 19. As clearly appears in Figures 1 and 2 of the drawings the horn sections are greater in diameter at their outer ends than at their inner ends whereby the sections, when extended, will be held in extended position through. frictional engagement.

The clamp arm 9 extends downwardly beyond the pointll, where it clamps the 7 receiver 5, and inwardly beneath the receiver terminating in a downwardly extending.

end 20 to which is pivotally fastened as at v21 a plug 22 the inner terminals 23 and 24:

wardly upon its pivotal support- 21 so as to 7 lie transverse the bottom of the receiver.

Intermediate the end 20 of the clamp arm 9 and the portion 11 which clamps the re ceiver this arm is bent upwardly as at 25 so as to engage the bottom of the receiver and more firmly and rigidly hold the horn in place.

The horn is preferably made of metal but should it be desirable the horncould be made of fibre, celluloid paper or any other suitable material. Good results have also been obtained by the use of a metal horn lined with paper.

It will be seen that the portable loud speaker can be marketed and sold as a commercial unit ready for plugging into a radio receiving set.

No special form ofreceiver is required as the invention can be readily adapted for use with any common'well known form of receiver now on the market.

The utility of the invention is very apparent. By reason of the small size of the device in its collapsed form it is very handy to carry about and is especially valuable in portable receiving sets where the conservation of space is important. The in vention can however be used with a set which is not portable. In this application the receiver could be mounted in thepanel of the receiving set and the horn, when the set is in use, could extend outwardly from the panel. It would not however be necessary to mount the device in the panel of the set as it could be positioned in any convenient place as desired.

By reason of the many uses to which the invention could be put with other slight changesyattntion is directed to the -tact that these slight changes would notdepart from the. spirit of the invention.

Having thus descrilidi'nyinve'ntifiinevhat I claim and desire to secure-by Letters Patent is 1; A loud speaker comprising-a receiver, a clamp having engagement with the re- *"'c 'eiver, tr cell ap'sible "hb'rn 111( mite d "ripen ene end of said clamp, and a plug ivetel'ly supported upon; theother end f the ela-mp.

,A IJGnt-Iiblfi lCl'Id speaker (limiplising' receiver, a e l a'n'ip h'avi ng engagement with the ret'eiveh a telefieepic horn mountedupon the elaiiip fin 'f'i'b'iit o f eaid 'reeeive an d a movah l gsup orte'ci upon the elam 3. A-peitable lend' speekerhemrising a receiver having an ear piece, aelam and having engagement with the r eei'ver 5Q 1,590,81LL

ear piece, and aplug movably mounted upon the other end of the clamp, whereby the horncan be collapsed upon the receiver and the plug swung parallel With the receiver "back whenthe device'is not in use.

4, Alportable loud speaker comprising a receiver, a spring clamp having engagement with sai'd 'receiverand having one end parallel with the front face of the receiver and i tsoppo'site e1'1d in engagement with the back of said receiver andoutwardly there from, a collapsiblehorn in'ounted upon the portion of the clamp paralleling the receiver frmmend a plu g pivotally supported upon the. opposite end of the clamp, wherehysaidplug can be-sw ung' to asposition parallel with the "re'Cei'X' er back when the devi'ee is not "inus'e.

-In" testimony whereof -I hereunto afii); hiysignature r CORAL DURETT. 

